Insulator rack



Patented Mar. 11, 1930 UNITED STATES PATENT OFFICE 'I0 LINE MATERIAL TION OF DELAWARE Application led January 29, X927.

This invention relates to certain new and useful improvements in insulator racks of the type particularly designed for supporting secondary wires and has as an obj ect the pro- Vision of a rack which is extremely simple in construction, etlicient in operation and capable of production at comparatively low costs.

Another obj ect of this invention resides in the provision .of an improved rack of the character described in which the insulator proper is' in compression at all times thereby increasing its strength and obviating the necessity of steel arm members to protect the same against side pulls.

Another object of this invention resides in the provision of an improved insulator in which the wire contacts only with the smooth porcelain member, all sharp edges of the metal securing means which are apt to injure the wire when stringing the same being imbedded in the porcelain.

Another object of this invention resides in the provision of an improved insulator so constructed that breakage of the porcelain allows the wire to drop rather than grounding the same to the frame.

Another object of this invention resides in the provision of an improved rack of the character described in which provision 1s made for threading a wire through a hole therein and having means for otherwise tying a wire thereto.

.A further object of this invention residesl in the provision of an improved insulator rack of the character described, the bracket or base member of which is of substantially tubular shape having a portion of its face struck back upon itself to provide a double thickness for the reception of the insulator mounting bolts.

A still further object of this invention resides in the provision of an improved insulator rack of the character described, in which the position of the upper insulator on the base member is such that it would be substantially impossible for a line man standing on the upper insulator to form a circuit to the metal base member.

With the above and other objects in view which will appear as the description pro-4 -WILLIAM D. KYLE, 0F MILWAUKEE, WISCONSIN, ASSIGNOR, BY MESNE ASSIGNMENTS, COMPANY, OIE' SOUTH MILWAUKEE, WISCONSIN, A CORPORA- Tnsureroa anon Serial No. 164,606.

ceeds, my'invention resides inthe novel construction, combination and arrangement of parts substantially as hereinafter described and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the hereindisclosed invention may be made as come within the scope of the claims.

In the accompanying drawing, l have illustrated one complete example of the physical embodiment of my invention constructed according to the best modes I have so far devised for the practical application of the principles thereof, and in which:

Figure l is a side view, partly in section and partly in side elevation, of a rack embodying my invention;

Figure 2 is a front elevational view of one end portion of my rack, and

Figure 3 is a transverse sectional view taken through Figure 2 on the plane of the line 3-8.

Referring now more particularly to the accompanying drawing, the numeral 5 designates a bracket or .base member formed from sheet metal and of substantially tubular construction having a top wall 6, and depending flanges 7 forming sidewalls, the. longitudinal marginal portions of which are directed inwardly, as at 8, to increase the rigidity of the bracket member. The wall 6 of the bracket member is apertured, as at 9, for the reception of lag screws or bolts for mounting the lbracket member to a support such as apole, the side of a building or the like.

At the adjacent points where the insulators 1l are to be mounted, the top wall or face 6 of the bracket member is apertured and struck back upon itself, as at l0, to provide suthcient thickness to firmly anchor the threaded ends of insulator mounting bolts l2. Each insulator 11 is preferably formed from porcelain and of substantially Oval shape in transverse section having two spaced beads 18 extending therearound to provide a central channel or groove 14: with which a transverse opening-l5 extending through the insulator registers, a transverse channel 16 being formed in the material between the opening 15 and the outer end of the insulator A the base to receive a wire 17 in Figure 1.

Bores 18 extend through the insulator on opposite sides of the opening 15, the outer ends of which are counter-bored, as at 19, to accommodate the heads 20 of the bolts 12, the inner ends 21 of which are threaded in the registering internally threaded openings in the wall 6 and the struck-up portions 10 of the base member. The bolts 12 hold the insulator with its base snug against the bracket member, thereby placing the porcelain in compression at all times and materially increasing its strength. y

The supporting bracket member' having relatively little depth and having its upper end on a plane lower than the top of the upper insulator precludes its use as a support by persons working on the primary wires thereabove and thus prevents their electrocution by the current which would run through their bodies and through the bracket. vIn addition, should the porcelain insulator break the wire drops rather than being held by some metal portion which would wear away its insulation and possibly cause a short circuit, the dropping ofthe'- wire also providing a positive indication of breakage to insure promptrepair. l

What I claimas myinvention is:

applied thereto as shown 1. In a device of the character described, a Achannel base member having a portion of its front wall struck out andbent back upon itself to give a double thickness to said wall,

` an insulator adapted to engage the basefat said point of double wall thickness, and a securing bolt for said insulator threaded in double thickness.

2. A device of the character described, comprising a hase member adapted to be se-l 4cured to a support, an insulator adapted to be secured to -tom flush thereagainst and having an opent-he base member with its boting extended transversely therethrough to providemeans for receiving a conductor, and securing bolts passing through the insulator at each side of said opening and connected with the base member, said bolts being embedded in. the insulator-and said insulator having a portionthereof extended beyond the base member whereby a line man, standing on the insulator, does not come in contact with the base member.

3. .device of the character described comprising a base member adapted to be Secured to a's'upport, an insulator having -a transverse opening through which a line wire may inserted to be supported by the insulator and having longitudinal bores extending through the insulator at each side of the transverse opening, the outer ends 0f the bores being counter-bored, and securing screws passed through the longitudinslab-Gresy member front wall at its point of signature.

` WILLIAM D. KYLE. 

